Platen press



K. M. ADLER.

PLATEN PRESS.

APPLICATION FILED SEPT. 1., 192.0.

1,413,699. Patentgd Apr-25, 1922.

. namely by striking the sheet laterally and lTED STATES PATENT OFFICE.

KARL MAX ADLER, or raonspoar, NEAR EirzIe, GERMANY, Ass IGnoIt T0 EMILKAHLE, or raunsnonr, NEAR L 1PzIe,-eERMaNY, A CORPORATION or GER- MANY.

PLATEN PRESS.

Application filed September 1, 1920. Serial No..407,549.

(GRANTED UNDER THE rzaovis ons or THE ACT or Manon 3, 1921, 4,1 sTAT.L., 1313.

To 6: whom it may concern.

Be'it known that I, KARL Max ADLER, englneer, a cltizen of Germany,residing at Pauns dorf, near Leipzig, Germany have in-' vented certainnew and useful Improvement in Platen Presses, .(for which I have filedapplication in Germany on Oct. 18,1913;

Switzerland on Feb. 11, 191 1, patented to Emil Kahle #663,745; Austriaon Feb. 12, 191%; Belgium onFeb. 17, 1914; France on,

Feb, 17, 1914; Italy on'Feb. 27, 191 1; Great Britain Feb. 16, 1914,Patent #4022 of 191 1,) of which the following is a specification. V

My invention refers to platen presses havits particular object being toprovide a cle-.

vice of this class which is distinguished both by. its simplicity andefficiency of action.

Up till now two different methods of auto .matically removing the workor printed.

sheets from a platen press are known,

by blowing it laterally. Thescope of these methods is limited, both asregards thesize and thickness of the work. Lateral striking isinsufiicient to remove the sheet from large platens, and with thin paperthere is the danger that the sheet instead of being completely removedfrom the platen, is only displaced thereon. If however, the member forremoving the work is guided or moved over the whole platen, there is thedisadvantage that an injury to the raising device almost unavoidableand, moreover, thin' paper is apt to be merely displaced instead ofbeing entirely removed. These disadvantages are avoided in onearrangement by which the work is laterally engaged by grippers carriedby a link parallelogram and drawn right across the platen and thenreleased. This arrangement, which, as it is driven from the main shaft,is only applicable to platen printing presses operated by foot or power,has in addition to its cost the defect that the work can only be grippedafter the platen has completed its return movement and come to rest inthe open position, which causes a loss in time. 7

The object of the present invention is to avoid the above mentioneddefects of the the printing, that is to say, whilethe platen isopening-drawn off the platen, and out of the machine and then deliveredtoone side so that the platen as soon as it comes tpl rest, is freeforthe reception of the next s eet.

The device can operate efliciently irrespectiveyof the size orvthicknessof the sheet.

The grippingolevice may take'the form of mechanical grippers adapted tooscillate or reciprocate and to close on to the sheet as theycomplete'their inward stroke, and to open to release the withdrawn sheetwhen they reach the end of their outward stroke; or it may take the formof a suction device adapted to engage with the sheet,withdraw it. fromthe platen and then, owing to the disconnection of the suction action,release the sheetfor delivery.

The gripping device is guided by guiding means carried by the platen oradj acent oscillating part of the machine so as to follow themovement's'thereof.

' The guiding means may be in the form of a rail oriron barof round orangular section fo-rm-ingra lateral extension of the platen, or thegripping device may be carried by a bar which slides in suitable guidesbelow the platen.

One mode ofcarrying out the invention is illustrated by way of examplein the accompanying drawings, according to which the gripping device isin the form of a pair of mechanical grippers adapted to slide on a guiderail extending laterally from the Specification of Letters Patent.Patented Apr. 25, 1922.

In the example illustrated, B is the bed and b is the platen carried bythe usual knee-shaped member a. A rail 0 extends from the right handside of the platen as seen from the operators position. 'A plate (.Z,fitted with a .pair of grippers i is posigripper blade.

tively guided on the rail 0 and is moved out wardly thereon by the handlever 9 through the medium of a wire cable k which is attached to a lugg on the hand lever, passes around a guide pulley f thence between theknee member a around a second pulley e on the'outer end of the rail 0,and is secured to the plate cl. The plate d is moved inwardly on therail by a spring 8. The platen is of known'construction where the railis secured pers i have completely withdrawn a sheet and are opened bythe wedge Z striking the stop 472, they release the sheet which falls bygravity into a box provided to receive it.

- A fresh-sheet is then placed in position, then as the platen begins toclose, the grippers move inwardly st1l1 open until they are released bythe wedge Z striking the inner stop 0 whereupon they close on the edgeof the sheet and are ready to withdraw it as soon as the platen againstarts to move open.

In order to prevent the withdrawn sheet being soiled by the lubricant onthe rail 0 it is adapted to be drawn without appreciable friction alongguard wires or strips 79 conven'ient'ly stretched between andheld by thestops 0 and m at a'suitable distance from the rail, the plate d beingsuitably grooved to clear them in its reciprocation.

As shown in Figures 3, 4, and 5, a wiper g conveniently formed of fiatiron bent to the shape shown and secured to the end of" the rail 0 isprovided with adjustable stops 1* against which the released sheetstrikes and is prevented from moving further outward, thus ensuring thatit shall be positively thrown aside as Well as under its own momentum.

I claim:

1. In a printing press, the combination with a substantially verticalbed, of an oscillating platen cooperating with said bed, guiding meanscarried by said platen and a sheet gripping device reciprocable 'onsa-idguiding means.

2. In a printing press, a substantially vertical bed, a platenoscillatable into and out of impression relation to said bed, guidingmeans carried by said platen, and a sheet gripping device reciprocableon said guiding means and towards and away from the vertical edge ofsaid platen.

3. In a printing press, the combination with a vertical bed, of anoscillating platen cooperating with said bed, guides carried by saidplaten, and a sheet gripping device re ciprocable on said guides in avertical plane into and out of position to grip a sheet which hasreceived an impression between said platen and bed for retracting saidsheet.

t. In a printing press, the combination 7 with a vertical bed, of anoscillatable platen cooperating therewith, guides carried by saidplaten, sheet gripping'means reciprocable on said guides into and out ofposition to grip the sheet for retracting said

